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WorksheetsLC Human Defence System
Total questions: 40
Worksheet time: 13mins
What is thought of as the primary defenses against pathogens in the human body?
Lymphocytes and phagocytes
Antibodies and lymphocytes
The skin and mucous membranes
The circulatory system
A disease causing organism is called...?
Parasite
Pathogen
Microbe
Bacteria
The ability to resist infection is called...?
Immunity
Invulnerability
Resistance
Health
What is the function of proteins in the blood called complements?
Kill bacteria by bursting them
Triggering the body to produce antibodies
Preventing blood loss by clotting the blood
Surrounding microbes and engulfing them
What is the role of interferons in the body?
Surround cells infected by viruses to stop them spreading
Surround bacteria cells to stop them spreading
Put holes in bacterial cell wall to cause them to burst
Cause the body to produce more antibodies to fight infection
Which of the following is not part of the general defense system?
Interferons
Complements
Antibodies
Inflammation
Where do lymphocytes and monocytes form?
Bone marrow
Spleen
Thymus
Lymph nodes
A foreign particle that causes the production of antibodies is called...?
Antigen
Monocyte
Pathogen
Leucocyte
Lymphocytes that recognize antigens on the surface of other white blood cells and cause B cells to replicate are called...?
Helper T cells
Killer T cells
Suppressor T cells
Memory T cells
Lymphocytes that destroy abnormal body cells are called...?
Helper T cells
Killer T cells
Suppressor T cells
Memory T cells
Lymphocytes that reduce the immune response of other cells so immune system does not overreact to an infection are called...?
Helper T cells
Killer T cells
Suppressor T cells
Memory T cells
Lymphocytes that survive for years after the infection and speed up any subsequent action of T cells are called...?
Helper T cells
Killer T cells
Suppressor T cells
Memory T cells
Where do T cells (T lymphocytes) mature?
Thalmus
Hypothalmus
Bone marrow
Thymus
What is the role of B lymphocytes?
Recognize an antigen and produce a specific antibody in response
Reduce the immune response of other cells so immune system does not overreact to an infection
Engulf foreign bodies and digest them
Attack pathogens by releasing enzymes to put holes in their cell walls
B lymphocytes produce
allergens
antigens
antibodies
all of these
Select all physical barriers making up 1st line of defence
phagocytes
mucous
skin
cilia
What is the name given to the cells that stay in the body and form part of your immunity to a pathogen?
Lymphocytes
Memory cells
White blood cells
Antibodies
Proteins that have a specific fit to a specific antigen are called
allergens
antibodies
antihistamines
none of these
What do antibodies attach to on the pathogen?
Monocyte
Antigens
Nucleus
Antibodies
Lymph nodes are found in the ....
a. neck
c. groin
b. armpits
d. all of the above
T or F - A fever can help you fight infection.
true
false
Which substances would lysozyme be found in?
White blood cells, tears, T-cells
Saliva, inflammation, Lymphocytes
tears, saliva, sweat
Mucous membranes, fever, B-cells
Lysozyme is a:
Bacteria
Acid
Enzyme
Virus
Name the acid in your stomach that can destroy pathogens.
Hydrochloric acid
Sulfuric Acid
Citric acid
Ethanoic Acid
Which parts of the respiratory system keep pathogens from reaching the inside of your body? (select all that apply)
cilia
lungs
mucus
blood
what does HIV do to our immune system?
It makes our immune system more stronger
It attacks red blood cells
It attacks our brain to stop working
It attacks our Helper T cells and weakens our immune system to the point where our body cannot fight pathogens
Destroy infected cells and recognize cancerous cells
Helper T Cells
T cells for delayed hypersensitivity
Suppressor T Cells
Cytotoxic T Cells
This cell activates cytotoxic T cells, other helper T cells as well as B cells
Helper T Cells
T Cells for delayed hypersensitivity
Suppressor T Cells
Cytotoxic T Cells
What correctly describes antibodies?
They can attach to many different antigens
They are a part of the innate immune system
They are specific to their antigens
They are found on invasive bacteria
